Fig. 1.
Flow chart of patients referred for right heart catheterization. A schematic depiction of our study cohort. RHC, right heart catheterization; ICD-9, International Classification of Diseases, 9th Revision.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.